Improvement



JOHN F. NIEHAUS.

Improvement in Multiple Time Dials for Clocks.

NO, 125,073. PatentedMarch26,l872.

WITNESSES: INVENTOR:

% W dgfimfimaaa.

UNITED STATES PATENT @FFIOE.

IMPROVEMENT lN MULTIPLE-TIME DIALS FOR CLOCKS.

Specification forming part of Letters Patent No. 125,073, dated March 26, 1872.

To all whom it may concern:

Be it known that I, JOHN FREDERICK NIE- HAUS, of St Louis. in the county of St. Louis and State of Missouri, have made a certain new and useful Improved Universal-Time Attachment for Clocks and 1 do hereby declare that the following is a full and true description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

The object of this invention is to form a simple and readily constructed universal-time keeper applicable generally to ordinary clocks, and by means whereof the correct daytime of different cities or towns can be seen or determined when computed from the standard time of any designated city. The nature of this invention consists chiefly in the constructive manner and arrangement of a series of dials, revolving on their respective axis with the revolutions of a circular-plate attachment, which in its turn is actuated to revolve by the hourshaft and gear of the clock.

To enable those herein skilled to make and use my said improvements, I will now more fully describe the same, referring to- Figure 1 as a plan view of my improved time attachment to the dial-face of an octagonshaped clock; and Fig. 2 as a central transverse section of same.

A represents the face-plate of the clock. B is the shaft to which the hour-hand is attached. 0 is a circular plate, provided with wire ribs 0, uniting in the center with a socket, 0 The plate 0 is placed on the face A, so that its socket c engages on the socket-shaft of the driving-gear or pinion on the hourshaft, as shown in Fig. 2. In order to revolve the plate 0 with the hour-pinion when thus arranged, its socket has a notch fitted to engage in a pin, 0 secured to said pinion of the clock. (See Fig. 2.) The plate 0 is provided upon its face with a series of small dials, D, which are relatively positioned, and have upon their face marked, enameled, or printed the hours of the day, &c., as shown in Fig. 1. The series of dials 1), however, are so arranged and attached as to revolve on their own axis (1. To accomplish this, each of said dials is properly weighted by a small weight, 61 (See Fig. 1.) By this means the said dials in their revolution are kept mrpendicular, (the same as if the dials were stationary,) the weight (1 regulating and controlling the revolving motion of each dial as the same is actuated by the revolutions of the plate O. The pointer or hand (1 of each dial is secured stationary to the axis of each. Thus it will be noticed that each dial D is actuated to revolve proportionately with the revolutions of the plate 0, thehands (Pindicating the continuous motion of each dial by the time designated upon its face.

To designate the time of foreign cities, each dial D has further marked upon its face the name of a foreign city; also, the dial-face can show the computed time in which said city is faster or slower to the standard time of the city with which it is to be computed, as indicated in Fig. 1. The time of the clock being, however, set to the standard time of a city, the time of any foreign city designated upon the dials is readily determined by the double revolutions of the plate (J and its dials D, the revolutions thus resulting apportioning the time for said foreign city. Thus, by setting the time of the clock to the standard time of St. Louissay 9.30 A. M.-the revolutions of the plate G and its dials D will apportion the time-sa-y for Washington city-to be 10.22 A. M., or for Boston, 10.46 A. M., &c. The proper dial E of the clock is placed and fitted within the revolving plate 0, being attached by its extension pieces 0 to the frame of the clock. The hour-hands E E are next secured as ordinary. The universal-time attachment described, being simple and cheap in construction and generally applicable to ordinary clocks in use, its usefulness as an improvement is readily apparent.'

Having thus fully described my said improvement, what I claim, is-- A universal-time attachment, consisting of dials D, weighted and provided with hands (1 circular plate U having ribs 0, socket 0 when said parts are arranged in combination with an ordinary clock, as and for the purpose set forth.

In testimony of said invention I have hereset my hand in presence of J OHN FREDERICK NIEHAUS.

Witnesses WILLIAM W. HnRTnnL, FR. N IEHAUS- 

